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Full text of "Text Book Of Mechanical Engineering"

596

Regnaulfs Experiments.

surface of the mercury.    Both tubes are surrounded by heated
water, whose temperature is shown by thermometer.

Regnault further found, as in Fig.-606, the temperatures and
pressures of saturated steam between 122 and 219, the experi-

ment having since been carried to 432. A is a boiler where
steam is formed, and B a copper sphere containing an artificial
atmosphere, produced by the condensing syringe c. As fast as
steam is formed, it is condensed by water passing from D to E
round the steam pipe; but this is a practical detail Essentially
the pressures in B and A balance, being measured by the open